Physics
A boy is swinging a ball attached to a string in a horizontal circle. If the string snaps

The ball will travel towards the center of the circle and fall down
It will fall down at the same place where the string breaks
None of these
It will continue to travel along a tangent to the circle at the point the ball was at the time of snapping and finally fall down

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Physics
Mirage is due to:

Equal heating of different parts of the atmosphere
Unequal heating of different parts of the atmosphere
Depletion of ozone layer in the atmosphere
Magnetic disturbances in the atmosphere

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